A "knob" of butter is a traditional British cooking term used to describe a small, roughly cube-shaped piece of butter. It's not a precise measurement but is often used in recipes to add a bit of butter for flavor and richness.
The actual size of a knob of butter can vary depending on the context and the individual cook. However, a rough estimate is that a knob of butter is approximately 1 to 2 tablespoons, or about 14 to 28 grams. It's usually enough to add a nice buttery flavor to the dish without overwhelming it.
When making scrambled eggs the British way, adding a knob of butter to the pan before cooking the eggs can enhance the taste and texture. Simply melt the butter in the pan over medium-low heat, then add the beaten eggs and gently stir until they reach the desired consistency.
Keep in mind that cooking terms like "knob," "dash," or "pinch" are not precise measurements but rather guidelines used in traditional cooking. It's often best to adjust the amount of butter according to your taste preferences and the number of eggs you are using. If you're unsure, you can start with a smaller amount of butter and add more if needed. Happy cooking!